curtain wall faÇade connections & sealing · a. cast-in anchoring solution 1. application...

CURTAIN WALL FAÇADE CONNECTIONS & SEALING

ZAK World of Façade - February 2019 BRISBANE

A. Cast-in anchoring solution

1. Application overview

2. Regulations

3. Enhansing concrete edge capacity

B. Sealing horizontal gap between edge of

slab and curtain wall


2. Considerations for an effective seal

3. Fire resistance requirements

AGENDA

ZAK World of Facade - Brisbane | February 2019 2

APPLICATION EXAMPLES IN DETAIL: FAÇADE & BUILDING APPLIANCES


COMPLIANCE WITH THE AUSTRALIAN STANDARD IS UNDER A DTS PROVISION OF THE NCC

NCC 2016

4ZAK World of Facade - Brisbane | February 2019

Anchor standard

Clause B1.4 references

SATS101

Scope – Testing – Design

Evidnece of compliance

ETA Report

Design parameters as

per AS5216

CONCRETE EDGE FAILURE

5ZAK World of Facade - Brisbane | February 2019

The most governing failure

mode

By the time the anchor channel is

designed, the variables influencing its

performance have already been defined

( rebar, thickness of the slab etc.)

AS 5216 provision to strengthen

the concrete edge

By accounting for edge reinforcement allowing

a 40% increase of the original capacity

AS 5216 provision of

supplementary reinforcement

By relying on supplementary

reinforcements designed according to

AS3600

COMPARISON BETWEEN OPTIONS

ZAK World of Facade - Brisbane | February 2019

While the provisions given in AS5216 allow to

increase the concrete edge capacity, in some cases

these are not enough to satisfy the design

requirements due to various application conditions:

• Edge reinforcement are not present or not enough

for the design.

• Supplementary reinforcements require the crack to

open for engagement, potentially leading to weaker

tensile resistance.

No reinforcement Rebar as supplementary

reinforcement

6

7

A NEW SOLUTION INCLUDING A CONFINEMENT PLATE ALLOWING HIGHER CAPACITY


COMPARISON BETWEEN THREE OPTIONS

8

No reinforcement Reinforcement

without edge plate

HAC EDGE


A. Cast-in anchoring solution


2. Regulations

3. Enhansing concrete edge capacity

B. Sealing horizontal gap between edge of

slab and curtain wall


2. Considerations for an effective seal

3. Fire resistance requirements

AGENDA


PROPERLY SEALING THE EDGE OF THE SLAB JOINT

• To maintain the fire resistance of the slab and

avoid fire spread between floors

• As a smoke seal to ensure safe evacuation

and asset protection

• As an acoustic barrier to avoid airborne sound

transmission between floors

The most common solution to seal the

edge of the slab is by using metal

flashing and caulking


The effectiveness of the seal could be easily

compromised due to movement of both the

curtain wall the structure

METAL FLASHING FOR CURTAIN WALL HAS TWO MAIN WEAKNESSES

Cracks in caulking and gaps in insulation creating

flanking paths also allowing flames and smoke


12

MOVEMENT: IS SEALANT & METAL FLUSHING GOOD ENOUGH?


HILTI’S INNOVATIVE SOLUTION: SILICONE BASED SPEED SPRAY

13Curtain wall, 2018

• Removing steel plate

cutting, fixing and caulking

• Replacing with one layer of

silicone based fire protection

spray


System tested to AS

standardSmoke & Toxic Gas

+/- 12.5% movement

designConstructability

Privacy

Training/ Certification Infection ControlEOS

(Horizontal & Vertical Loads)Containment

Health and Safety

Inspection Energy SavingsTOW

(Vertical Loads)

Contamination

(mold)

Documentation Pressure (+/-) Control Seismic Building Accidents

KEY BENEFITS OF USING CFS-SP SIL

Fire and

smoke sealWater

Resistance

Air

TightnessMovement Sound

Attenuation


15

Flexible Firestop

(Movement capable)

Mineral Wool (Compressed)

A SIMPLE SOLUTION DESIGNED SPECIFICALLY FOR CURTAIN WALL ALLOWING HIGHER MOVEMENT


FIRE RESISTANCE TEST AS PER AS1530.4

16Curtain wall, 2018ZAK World of Facade - Brisbane | February 2019

THANK YOU

Hilti (Aust.) Pty Ltd

www.hilti.com.au


curtain wall faÇade connections & sealing · a. cast-in anchoring solution 1. application...

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